If you are not into vacuum tubes, Ramsey Electronics
( www.ramseykits.com) has a transistorized AM transmitter
kit that you can build. It uses six 2N3904 transistors to
generate the modulated RF signal.
As for the future, the broadcaster board could be
HOW TO PROGRAM
1. VoiceShield, Software: Page 4 — Voice Shield FAQ
2. Forum, VoiceShield
1. The following installation was for a Windows XP
machine. Other platforms are also supported by
2. Download the Arduino IDE if not already loaded.
3. Go to the SpikenzieLabs/VoiceShield website and
click on Software.
4. Download “Arduino VoiceShield Library” into the
5. Create a VoiceShield folder and download
6. Locate the already downloaded SoundScore.txt file
and download “SoundBytes” into the same folder.
7. Downloading “VoiceShield Programmer” is optional;
the Lite version is fine.
1. Connect a USB cable from your computer to the
2. Locate a 3. 5 mm audio splitter so you can listen to
the audio going into the VoiceShield.
3. Connect the input of the splitter to your computer’s
4. Connect headphones to one output of the splitter.
5. Connect an audio cable from the other splitter output
to the VoiceShield Audio In jack.
6. Set your computer’s audio output volume at a normal
housed in a nice metal case for shielding, and the controls
could be changed to ones that have knobs. Perhaps the
tube could even be replaced with a transistorized circuit
so it doesn’t draw so much power. I would sure hate to
see the tube go, however, since it’s so quintessentially
Record 80 Prerecorded Words and Do a Playback
1. Open the Arduino IDE and load VS_Loader (in the
Arduino/examples folder) into the Arduino Uno.
2. Run VS_Loader, then close the Arduino (because the
port needs to be released).
3. Open VSProgrammerLite and select the port.
4. Press Program. Wait for 80 words to load. You should
hear the words in the headphones as they are loading.
If not, recheck the wiring.
5. Close VSProgrammerLite.
6. Move the headphone plug over to the VoiceShield
Audio Out jack.
7. Open the Arduino again, load File/Examples/
VoiceShield/BasicPhrase Talk, and run it.
8. You should hear a number of phrases being played
from the VoiceShield memory, such as “How much is
Make Up Your Own Sentence and Play It Back
Load and run this simple sketch into the Arduino:
VoiceShield vs(80); // create 80 slots
// “Do” (play slot 56)
// “You” (play slot 68)
// “Want” (play slot 44)
// “The”””””(play slot 42)
// “Hot Dog” (play slot 50)
// delay 2 secs, then loop
Now, you can write a simple program to say any of the
80 words listed in Table 1.
I love Audacity. It’s a free piece of audio editing software
that lets you see exactly what the audio waveform is doing. It
has a very intuitive learning curve. It is simple to control the
timing of clips by inserting “silence” or cutting out portions.
You can amplify or reduce certain sections in order to match
overall levels. In fact, I haven’t even scratched the surface
regarding its capabilities, but I did have a lot of fun.
Recording Your Own Sounds, Music, or Voice
I had a number of problems putting in my own audio,
but here’s what I found that worked.
1. Load your audio clips into Audacity — whether they